23
1) This elephant likes bananas, doesn't it?
2) Elephants like bananas, don't they?
3) Mike wants to go to the zoo, doesn't he?
4) The boys like to play snowballs, don't they?
5) Many birds fly to Africa, don't they?
6) Birds don't like milk, do they?
7) Wolves don't live in cities, do they?
8) Mr Black's dog doesn't eat fish, does it?
9) Tigers are cleverer than cats, aren't they?
10) The monkey is funnier that the parrot, isn't it?
24
1. This humster is Billy's pet.
2. The tortoise is Billy and Bob's pet.
3. My grandparents' car is not new.